问题描述：
根据首字母写出单词（初中英语）
1.i______________________ cause something to become better
2.s______________________ known to us but not known to other people unless we tell them
3.s______________________ not showing thought or understanging,follish
(最好有相关解释）
what （ ）it is to swim in the summer
Thanks
1.i______________________ cause something to become better
2.s______________________ known to us but not known to other people unless we tell them
3.s______________________ not showing thought or understanging,follish
(最好有相关解释）
what （ ）it is to swim in the summer
Thanks
问题解答：
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